Upgrading Your Server 9-336. Remove the dummy cover from the fan box.The dummy fan cover has locking mechanism with its rear face. While pushing the lock,lift the dummy fan cover slowly to remove it.7. Insert the Option A fan unit into the slot for additional rear fan.Insert the groove of the Option A fan unit along with the guide of the factory-installed rearfan, and push it to the end.Factory-installed front fanDummy fan coverOption A fan unitFactory-installed rear fan
